HClO4 is commonly known as Perchloric acid. As the name suggests, this compound is an acid. Generally an acid, is a proton donor, has a pH below 7, neutralizes base and turns blue litmus paper to red. This also means that in a solution (in water) HClO4 produces Hydronium ions (H3O+ ions).
The chemical equation for the dissociation of Perchloric acid (HClO4) in the solution can be written as:
H2SO4 (aq) + H2O ---> H3O+ + HClO4-
**hydronium ions can be represented as H3O+ or simply H+.
Perchloric acid is classified as a strong acid